Asymmetric Choi--Davis inequalities

Mohsen Kian, M. S. Moslehian, R. Nakamoto

Let $\Phi$ be a unital positive linear map and let $A$ be a positive invertible operator. We prove that there exist partial isometries $U$ and $V$ such that \[ |Φ(f(A))Φ(A)Φ(g(A))|\le…